{"title":"Interfacial Engineering and Defect Passivation for Highly Efficient Carbon-Based Perovskite Solar Cells","authors":"Limei Wu, Mingming Zhao, Bao Zhang, Ke-jian Jiang, Wei-Min Gu, Dongzhi Liu, Xueqin Zhou","doi":"10.1002/ente.202500305","DOIUrl":null,"url":null,"abstract":"<p>The interface regulation between SnO<sub>2</sub> and perovskite is a critical and challenging issue for highly efficient and stable perovskite solar cells (PSCs). Herein, guanidinium sulfate (GA<sub>2</sub>SO<sub>4</sub>) is introduced as an interface layer between SnO<sub>2</sub> and perovskite, where the ammonium cation in GA<sub>2</sub>SO<sub>4</sub> can provide more hydrogen bonds for strong coordination with surrounding halides, especially uncoordinated I<sup>−</sup>, while the sulfate ions (SO<sub>4</sub><sup>2−</sup>) are strongly coordinated to Sn<sup>4+</sup> and uncoordinated Pb<sup>2+</sup>, passivating the defects from both the SnO<sub>2</sub> and perovskite layers. With the GA<sub>2</sub>SO<sub>4</sub>-modification, hole-selective layer -free carbon-electrode-based PSCs (C-PSCs) are fabricated and exhibited a higher power conversion efficiency of 17.91%, followed by enhanced environmental stability.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 9","pages":""},"PeriodicalIF":3.6000,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy technology","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ente.202500305","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0
Abstract
The interface regulation between SnO2 and perovskite is a critical and challenging issue for highly efficient and stable perovskite solar cells (PSCs). Herein, guanidinium sulfate (GA2SO4) is introduced as an interface layer between SnO2 and perovskite, where the ammonium cation in GA2SO4 can provide more hydrogen bonds for strong coordination with surrounding halides, especially uncoordinated I−, while the sulfate ions (SO42−) are strongly coordinated to Sn4+ and uncoordinated Pb2+, passivating the defects from both the SnO2 and perovskite layers. With the GA2SO4-modification, hole-selective layer -free carbon-electrode-based PSCs (C-PSCs) are fabricated and exhibited a higher power conversion efficiency of 17.91%, followed by enhanced environmental stability.
期刊介绍：
Energy Technology provides a forum for researchers and engineers from all relevant disciplines concerned with the generation, conversion, storage, and distribution of energy.
This new journal shall publish articles covering all technical aspects of energy process engineering from different perspectives, e.g.,
new concepts of energy generation and conversion;
design, operation, control, and optimization of processes for energy generation (e.g., carbon capture) and conversion of energy carriers;
improvement of existing processes;
combination of single components to systems for energy generation;
design of systems for energy storage;
production processes of fuels, e.g., hydrogen, electricity, petroleum, biobased fuels;
concepts and design of devices for energy distribution.
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